Finishing head for bolt-turning machines



w. T. LINGO. FINISHING HEAD FOR BOLT TURNING MACHINES.

APPLICATION FILED OCT. 9. I918.

2 SHEETS-SHEET I.

-- I William TLingo Patented Feb. 14, 1922.

W. T. LINGO.

FINISHING HEAD 'FOB BOLT TURNING MACHINES.

APPLICATION FILED OCT. 9. ms.

2 SHEETS-SHEET 2.

' I F lm 3mm!" i mm H In rm n mm WITNESS" IN VEN TOR.

fay/j E. W. 771312290 ATTORNEY.

UNITED STATES PATENT; OFFICE.

' WILLIAM '1. LINGO, 0F PHILADELPHIA,'YENNSYLVANIA.

FINISiE-IING HEAD FOR BOLT EUR-NING MACHINES.

incense.

T0 all' whom it may concern: v

Be it known that 1, WILLIA T. LrNoo, a citizen of United States, residing at 1525 Swain Street, Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new. and useful Improvements in Finishing Pleads for Bolt-Turning Machines,' of which the following. is specifi-v cation. 1 v i 1 This invention relates to finishing heads for bolt turning machines and it has more particular reference to thattype or form of finishing heads which are usually employed on vertical spindle machines for turning taper boltsfor locomotive building, and employment where a driving fit. is essential. I

leretofore several forms of such heads have been devised and used for the purpose referred to, but all of them have necessitated the employment of what may be termed auxiliary or separate machinery to perform one or more of the operations in order to completely produce a finished tapered or straight bolt.

Now the main" object of my invention is to provide a finishing-head for turning taper or straight bolts which will perform theseveral operationsin one ,cut.

Another object of my invention is to provide a finishlng head of the type referred to which Wlll chamfer, rough, finish, square up under the head of the'bolt, and round the end of the shank ready for threa din g, in one out. I

A still further" object of my invention to provide a finishing head for turningtapcr or straight bolts whereby a substantial saving of time and labor is effected, and furthermore, the output is increasedas I' have proven by actual testssome twohundred and fifty to three hundred per cent. as compared withthe present forms of, finishing heads generally in use;

With these" and other objects in view, the invention consists essentially in the features of construction, combination and arrangement of the several parts hereinafter fully described, illustrated bythe accompanying explanatory drawings, and more specifically pointed out byv the appended claims.

In describing my invention in detail. ref erence will be had to the-accompanying drawings forming a part of this specification, wherein like characters denote like or corin place by screws 13.

that I preferably arrange the segmental spacing members 12 in line with the dia-* Specification of Letters Patent. Patented F311 14, 1922, Application filed October a, 1918. Serial in. 257,529.

responding parts throughout the several views, and in which Figure l is a top plan View of a two cutter be used in lining up the cutter-head.

Figure 5 is a top plan view of a modified form of my invention and including three cutters. I

Figure 6 is a fragmentary elevation, partlyin' section, 0t an attachment for the under siderof the head, and

Figure 7 is anunder side plan of the same.

Figure 8 is a detail section showing the laterally extending cutting portion ononc of the. cutters. I i

lleferring more particularly to Figuresl to 3 of the drawings, the numeral 10 indicates. the finishin head inits entirety, and

said head consists of a cylindrical body or cutter-holder 11, internally whereof and diametrically opposed are firmly secured segmental spacing members 12 said segmental spacing members 12 being conveniently held It is to be here, noted metrically disposed lugs i l, and by means of which the device is adapted to be held in place on a-stationarytable.

Arranged within the arcuate spaces. or openings 15 formed between the aforesaid segmental spacing members 12, are members 16 which are known to the art as steady rests, and which will be so termed here after, and said steady rests l6 are radially adj ustablediametrically opposite each other by adjusting screws 17, furnished with lock nutsLS. These steady rests 16 are disposed diametrically opposite each other against one of the longitudinal and radial fiat faces 19. oi the segmental spacing members 12;

and against the other longitudinal and radial fiat faces 20 of said segmental spacing members 12. I arrange the cutters 21 which are radially adjustable by adjusting screws 22 furnished with lock nuts 23.

Between thesteady rests 16 and the cut ters 21, are located the segmental wedge or filler members 24, which are adapted to be forced into firm engagement with the adjoining steady rest 16, and cutter 21, by screws 25, so as to lock said parts in firm adjusted rel atlon.

21'- are similarly grooved at 29, to provide free discharge for the shavings during the operation of turning a bolt.

The cutters 21 are preferably extended slightly beyond the upper ends of the steady rests 16, so as to form what maybe termed icutting heads for operating on the under side of the bolt head, and it is to be noted particularlythat I form one of the cutters 2i with an inclined upper cutting edge 30,

which serves to chamfer' the end of the shank of the bolt as it enters the head,there by insuring the removal of any fray or pro jecting edges on the forging, as well as m-' suring the proper centering or lining up of said bolt. Similarly the steady rests 16 are likewise chamfered at 31 to further insure the proper entry and lining of the entering bolt.

In-some cases, and more particularly when operating upon steel bolts, I preferably use the form of my invention shown in Figure 4., and which is substantially the same as above described, excepting that employ three cutters 32, 33, 34 respectively, for chamfering, roughing and finishing; and further that I dispense with the steady rests 16, and in lieu thereof employ adjusting screws 35. These adjusting screws 35 are threaded into the cylindrical body or head 11, and are provided with plain reduced extensions 36, which pass easily through radial holes 37 in the segmental spacing members 12, and they are arranged in staggered relation around the head 11 and fitted with lock nuts 38.

lVhen using this form of three-cutter head, I employ a gauge 39, such as is shown in Figure 4, for lining up the cutters 32, 33, 34, and adjusting screws 37, and its function and use will be apparent to those skilled in the art without further detailed explanation.

In order to provide a simple and effective means for rounding the ends of the bolt shanks ready for threading, I employ the means shown in Figures 6 and 7 and which comprises a collar 4L0, providedwith lateral arms 41 appropriately holed at 42, for the free passage of screws 43 firmly threaded into holes 44:, provided for their reception in the under side of the cylindrical body or Counterbored screws 26' are threaded into the ends of the segmental When operating upon standard lengths of bolts I may form one of the cutters 2O with a laterally-extending rounded-out cutting portion 20 at its lower end for the same purpose, Figurev 8.

From the foregoing description, the as: sembling and adjustingof my improved finishing head will be readily understood, while the advantages and novel features will be self apparent, for instance my novel finishing head has the capacity of function of completing all of the operations in one out. In other words my novel head contains one cutter for the purpose of tapering the bolt and putting a smooth finish thereon and squaring it up under the "head, whilethe other cutter .is'used for chamfering the bolt and taking a rough cut ofl the same and rounding the end; thus the head completes five operations atone cut, and the operator is required to handle the bolt only three times. It will be obvious that by the manipulation of the adjusting screws, cutters, steady rests 16 and adjusting screws 35, the head can be easily converted for operating upon straight or tapered bolts, and I wish it clearly understood that I do not limit my self to the precise construction shown and described, other combinations and arrangements of the several parts being possible without departing from the nature and es sential features as above disclosed, such other arrangements and combinations, how ever, being limited by the scope of the appended claims.

I claim:

1. In a finishing head for bolt turning machines, the combination of a cylindrical casing, diametrically opposed segmental spacing members secured within said cylindrioal casing, opposed steady rests disposed against one of the radial walls of said segmental spacing members, opposed cutters disposed against the other radial walls of said segmental spacing members, arcuate wedge members disposed within the arcuate spaces betweenthe aforesaid segmental spacing members, and adapted to engage the.

casing, a like number of cutters disposed against one of the Walls of said spacing members, wedge members disposed within the spaces between the aforesaid spacing members and adapted to engage the cutters and the opposed Walls of the spacing members, means for adjusting and locking said parts in position, and a series of staggered adjusting screws for steadying the bolt during turning.

'33. In a finishing head for bolt turning machines, the combination of a cylindrical casing a series of radially disposed segmental spacing members secured Within said cy1indrical easing, a like number of cutters disposed against one of the radial Wallsof said segmental spacing members, arcuate Wedge members disposed w1th1n the arcuate spaces between the aforesaid radially disposed segmental spacing members, and adapted to engage the cutters and the opposed radial Wall of the segmental spacing members means for adjusting and locking said parts in position, and a series of radially disposed staggered adjusting screws for steadying the bolt during the operation of turnin In testimony whereof Iaflix my signature.

WILLIAM T. INeo; 

